Repair; Replacing A Leaking Needle Seal; Replacing The Material Nozzle, Needle, Springs And Seals; Troubleshooting And Fault Rectification - WALTHER PILOT GA 9010 Manuel D'utilisation Original

7

Repair

Warning
Before starting repair work, depressurise the control and atomiser air, as well as the
material supply to the spray gun - risk of injury.
Note
Refer to the exploded view (page 2) and the spare parts list (page 30) of these ope-
rating instructions to perform the specified steps.
7.1 Replacing a leaking needle seal (GA 9010 Marking)
1. Depressurise the spray gun.
2. Loosen the two hexagon socket screws (4) and remove the front part (5) from
the piston casing (15).
3. Unscrew the packing screw (11) along with the pressure spring (10) and the
pressure ring (9) from the front part.
4. Remove the two needle seals (8) from the front part.
5. Insert the new needle seals.
The assembly of the remaining components takes place in reverse order.
Note
The needle seal (8) taken from the gun attachment must not be reused, otherwise a
reliably functioning sealing effect cannot be ensured.
7.2 Replacing the nozzle, needle, springs and seals
Dismantle the spray gun as described in section 5.4 Converting the spray gun if the
following components need to be changed:
• Material nozzle
• Pressure spring*
• Material needle
• Needle spring
• Symmetrical lip seal*
Note
Components marked * must be greased with WALTHER PILOT spray gun grease
before installation in the gun body.
Note
For GA 9010 Marking/-MB automatic spray guns, WALTHER Spritz- und
Lackiersysteme stocks a repair kit containing all wearing parts:
GA 9010 Marking
GA 9010 Marking-MB
V 16 300 00 XX3*
V 16 320 00 XX3*
44
8

Troubleshooting and fault rectification

Warning
Always depressurise the control and atomiser air and the material supply to the spray
gun before starting maintenance and repair work - risk of injury.
Fault Cause
Material needle or nozzle
dirty
Material needle or nozzle
damaged
Gun drips
Packing screw (11) too tight
Sticking between needle
and packing
Control air pressure too low
Gun does not open
Nozzle and needle sticking
Insufficient material in mate-
rial container or
Pulsating or unstea-
dy jet
material pressure too low
with Membrane version
Gun emits spray in Symmetrical lip seal (16)
idle position damaged
9

Disposal

Materials used during cleaning and maintenance must be properly disposed of in
compliance with laws and regulations.
Warning
Pay particular attention to the information of the spray and cleaning agent manufac-
turer. Material that is disposed of carelessly puts the health of persons and animals
at risk.
45
Remedy
See 5.4 Converting, removing and
cleaning the spray gun
See 5.4 Replacing the material
needle or nozzle
Loosen packing screw with an 8
wrench
Use slow-drying marking paint or
switch to GA 9010 Marking
Membrane
Increase the control air pressure to
at least 4 bar
Loosen by opening multiple times,
with a steel/steel combination nozz-
le/needle.
Top up material (see operating
instructions of system manufacturer)
Increase material pressure
Replace